A048990 - cp's OEIS frontend

A048990 Catalan numbers with even index (A000108(2n), n >= 0): a(n) = binomial(4n, 2n)/(2n+1).

n	a(n)
0	1
1	2
2	14
3	132
4	1430
5	16796
6	208012
7	2674440
8	35357670
9	477638700
10	6564120420
11	91482563640
12	1289904147324
13	18367353072152
14	263747951750360
15	3814986502092304
16	55534064877048198
17	812944042149730764
18	11959798385860453492
19	176733862787006701400

[1, 2, 14, 132, 1430, 16796, 208012, 2674440, 35357670, 477638700, 6564120420, 91482563640, 1289904147324, 18367353072152, 263747951750360, 3814986502092304, 55534064877048198, 812944042149730764, 11959798385860453492, 176733862787006701400]

cp's OEIS Frontend

A048990 Catalan numbers with even index (A000108(2n), n >= 0): a(n) = binomial(4n, 2n)/(2n+1).

Table of values

List of values

cp's OEIS Frontend

A048990 Catalan numbers with even index (A000108(2*n), n >= 0): a(n) = binomial(4*n, 2*n)/(2*n+1).

Table of values

List of values

A048990 Catalan numbers with even index (A000108(2n), n >= 0): a(n) = binomial(4n, 2n)/(2n+1).